Logging-carriage



J. A. PIERSON.

LOGGING CARRIAGE.

APPLICATION FILED DEC. 31. 1920.

' Patented July 19, 1921.,

2 SHEETSSHEET I.

J. A. PIEHSON.

LOGGING CARRIAGE.

APPLICATION FILED 050.31, 1-920.

Patented July 19, 1921.

2 SHEETS-SHEET 2.

1/04/06 A. Flt i504 5951 11 /II'i STATES JULIUS A. PIERSON, OF WINLOCK,WASHINGTON.

LOGGING-CARRIAGE.

Specification of Letters Patent.

Patented July 19, 1921.

To all whom it may concern:

Be it known that I, J ULIUS A. PERSON, a citizen of the United States,residing at vVinlock, in the county of Lewis and State of Washington,have invented certain new and useful Improvements in LoggingCarriages,of which the following is a specification.

This invention relates to a logging car riage of that class which isused with logging apparatus in whichcable Ways are employed for thetransportation of logs from place to place.

One object of the invention is to simplify and improve the constructionand operation of the carriage which is employed for conveying the load.

A further object of the invention is to provide simple and efiicientmeans for greasing the cable and lubricating the journals of the sheavesor supporting wheels.

A still further object of the invention is to provide means for holdingthe carriage while the logs are being held at the spar tree which isusually at the top of a steep grade. I

With these and other ends in view which will readily appear as thenature of the invention is better understood, the same consists in theimproved construction and novel arrangement and combination of partswhich will be hereinafter fully described and particularly pointed outin the claims.

In the accompanying drawings has been illustrated a simple and preferredform of invention, it being, however, understood that no limitation isnecessarily made to the precise structural details therein exhibited,but that changes, alterations and modifications within the scope of theclaims may be resorted to when desired.

In the drawing Figure 1 is a side elevation of the carriage,

Fig. 2 is an end elevation thereof parts being shown in section,

Fig. 3 is a fragmental view showing the construction of the automaticholding device used in connection with the carriage,

Fig. 4t is a similar view, and

Fig. 5 is an elevational view of one of the gripping jaws.

Referring to the drawings in detail 1t Wlll be seen that the carriage ispreferably formed of the two parallel spaced apart side walls 5 whichare suitably connected together by rivets or bolts and may have porofapertures.

tions thereof removed for lightening the device if so desired. In orderto efficientlv brace the plates 5 a frame 6 is arranged around the edgeof each plate and may be substantially rectangular in shape andpreferably formed from angle iron and is riveted or bolted to eachplate. At the upper corners of the carriage suitable sheaves orsupportlng Wheels '7 are provided and are con structed with the stubaxles 8 which protrude 1n ournal boxes 9. These journal boxes areprovided on each of the plates 5. Each j ournal box 9 is constructed soas to include an upper compartment 10 and a lower compartment 11. Theupper compartment 10 is provided with suitable openings so that oil maybe inserted therein and this compartment 10 will communicate with thecompartment 11 through an aperture or a series The usual waste is packedinto the compartment 11 so as to be saturated from the oil in thecompartment 10. A journal bearing block 12 is disposed between the uppertank 10 and the stub axle 8 in each lower compartment 11 and is held inplace by means of a transverse pin 13 which prevents lateral movement ofthe block 12. By removing this pin 13 it will be readily seen that thisblock may be easily removed. Any suitable closure means may be providedfor the lower compartment 11 if so desired or it may be left open as isshown at 14c so that the bearing block 12 may be pushed therethrough. Atank 15 is disposed between the plates 5 intermediate the sheaves 7 andis provided with a plurality of fountain brushes 16 which are incommunication therewith through pipes 17. These fountain brushes 16 arearranged so as to sweep or brush over the cable 17 and a lubricant willbe provided in the tank 15 so that this cable 17 may be greased as isvery desirable in a logging apparatus. In one of the lower corners ofthe frame or carriage a suitable swivel 18 is provided to which isattached the hauling rope or cable and in the other corner a pulley 19is provided for hoisting and lowering the load by means of a rope orcable 20 passingthereover.

At the end of the carriage in which is provided the pulley wheel 19 aplate 21 is provided for supporting a housing 22 which is an extensionto the carriage. This housing 22 comprises two spaced apart plateshaving arcuate slots 23 therein for receiving pins 24 on the plate 21 sothat this extension may move pivotally in relation to the plate 21. Asheave 25 is suitably journaled in the extension so as to bear on thecable 17. Am automatic holding device is held in thee;- tension andincludes the oppositely disposed housings having slidably mountedtherein blocks 31 which form jaws for a purpose which will be laterdescribed. These jaws 31 are glidable in, the housings 30 and arenormally in engagement with: each other as shown in Fig. 3 by means ofthe expansion coil spring 32 which may be suitably tensionedthrough thescrews 33. A grip or stop 34:.is fixed to the cable 17 adjacent the spartree where it is desired to unload the logs which is usually at the topof a steep incline and as the carriage is moved on the incline it-passesover the grip or stop 34 and it should be noted that this stop 8% hasits ends tapered: so that the 'aws 31 are opened as they pass thereover.fter the jaws have completely passed over the stop 34: the carriage willnot automatically return to the loading position until it is so desired.In the devices now commonly in use when a turn of logs is being hauledin over a steep grade on the sky line and dumped at the sp r t ee heordinary arr ge always un back by its own weight therebytightening theline Which is to be unhooked. Because of automatic holding device justdescribed the carriage will beheld in position I when; the load; is:dropped thereby allowing 35 enough slack theiline for unhooking. hen thecarriage comes in with a loadthe sudden pressure against the grip causesthe jaws ch a h ld pre se against each other bymeans of the springs 32,,to open and thenagain close when the jaws have passed over the grip,After the carriage has come to a stop and runs back .to the grip it willnot have suflicient momentum to cause the jaws to open and it willrequire the pull of the back line to release the carriage from the grip,As the jaws hit the stop or grip the carriage comes momentarily to astop thus preventing the whole carriage from passing over the grip. Thisautomatic holding device is attached to the carriage through the meansof the extension 22 and because of the movable relation of thisextension with the carriage the holding device is sure to be inperfectalinement under ll working conditionsand angles of the sky line bymeansof the sheaves 25 and the in hejhousing for thepu pose specified.

2, In combination a logging carnage, a.

housing pivotally associated therewith, a sheave j ournaled 1n thehousing, a pair of oppositely disposed blocks carried slidably in thehousing, means for holding the blocks normally in engagement withGilChjOll'hfiFr In testlmony whereof I aflix my signature in presence oftwo Wll I GSSQS;

JULIUS AQPiERSON, Witnesses a i I NEWELL L. WRIGHT, ALICE A. WRIGHT.

